public void Load(Stream aStream)
{
var _decoder = new GifBitmapDecoder(aStream, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.OnLoad);
aStream.Position = 0;
var _formatIdData = new byte[FormatId.Length];
aStream.Read(_formatIdData, 0, _formatIdData.Length);
var _br = new BinaryReader(aStream);
this.FScreenWidth = _br.ReadUInt16();
this.FScreenHeight = _br.ReadUInt16();
int _flags = _br.ReadByte();
this.FBackgroundColorIndex = _br.ReadByte();
aStream.ReadByte(); // skip pixel shape
if ((_flags & 0x80) != 0)
{
int _bitsPerPixel = (_flags & 0x07) + 1;
int _paletteLength = (int)Math.Pow(2, _bitsPerPixel);
var _colors = new List <Color>(_paletteLength);
for (int i = 0; i < _paletteLength; i++)
{
var _c = new Color();
_c.R = _br.ReadByte();
_c.G = _br.ReadByte();
_c.B = _br.ReadByte();
_colors.Add(_c);
}
this.FGlobalPalette = new BitmapPalette(_colors);
}
GifExtension _extension = null;
while ((_extension = GifExtension.Load(aStream)) != null &&
_extension.ExtensionType != ExtensionType.ImageBehaviorExtension)
{
this.Extensions.Add(_extension);
}
for (int i = 0; i < _decoder.Frames.Count; i++)
{
var _currentFrame = new GifBitmapFrame(_decoder.Frames[i]);
_currentFrame.BehaviorExtention = _extension;
_extension = _currentFrame.Load(aStream);
this.Frames.Add(_currentFrame);
}
}
public void AddFrame(GifBitmapFrame aFrame)
{
this.Frames.Add(aFrame);
}
